pseries/cpuidle: Remove dependency of pseries.h file

As a part of pseries_idle cleanup to make the backend driver
code common to both pseries and powernv.
Remove non-essential smt_snooze_delay declaration in pseries.h
header file and pseries.h file inclusion in
pseries/processor_idle.c

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/pseries.h

@@ -60,9 +60,6 @@ extern struct device_node *dlpar_configure_connector(u32);
 extern int dlpar_attach_node(struct device_node *);
 extern int dlpar_detach_node(struct device_node *);
 
-/* Snooze Delay, pseries_idle */
-DECLARE_PER_CPU(long, smt_snooze_delay);
-
 /* PCI root bridge prepare function override for pseries */
 struct pci_host_bridge;
 int pseries_root_bridge_prepare(struct pci_host_bridge *bridge);